Easily Open Existing Non-Eclipse Project in Eclipse?

Alright, this has caused me enough grief. The answer may be dead simple, but I need some help.

I figured it would be simple to open an existing project in Eclipse, but I'm having quite a time actually making this work. I don't want to change where it's located. I don't want to pull a bunch of strings to get Eclipse to point to it. I just want to take the project directory from where it is now and open it in Eclipse.

Is there any way to do this?